LQM&reg; 11.1V 65Wh New Replacement Laptop Battery for Dell Inspiron 14R Series N3421 N5421 Inspiron 5437, Dell Inspiron 15 Series (3521, 5521, 5537), Dell Inspiron 17 Series (3721, 3737, 5721, 5737), Latitude 3440, Latitude 3540, Vostro 2421, Vostro 2521